Sliding gates provide not only entry and exit from the local area, but also distinguish the site from neighboring houses. The gate can indicate the tastes and financial situation of the owner, and can protect against unauthorized entry. At the same time, you can significantly save on the installation of sliding gates if you do the installation yourself.
Views
Sliding gates, according to the control principle, are suspended, cantilever and moving along the rail. In addition, they are divided into single-leaf and double-leaf designs, the latter, by the way, are more expensive, since installation will require twice as much fittings. It should also be noted that sliding gates made of metal are solid, they are also called "deaf", and lattice. Lattice products, in turn, are divided into products either mass-produced or custom-made - forged.
The suspension system is the least commonly installed, and, as a rule, in industrial plants or in commercial areas. The movement of the door leaf is carried out by the upper beam, which is somewhat reminiscent of a rail. The rollers are located directly on the metal beam.
The advantages of such a system can be considered ease of use, durability, and due to the fact that the whole process of the mechanism is adjusted in the upper part of the gate, the lower part remains free, respectively, not depending on weather conditions.
Perhaps the main disadvantage of such a system is the height limitation. If a heavy truck needs to enter a fenced area, it is most likely not to pass.
The situation can be corrected if the bar is raised by 1.5 m, but this will require increasing the supports, and this is a large financial cost.
As such, there is no height limitation for sliding gates moving along the rail. The rail is mounted on a surface for which a concrete base is poured. A roller is welded to the canvas, which slides along the rail.
Often this type of sliding gate is installed in the private sector. They are held open by a metal frame. In this case, the sashes can be open or closed, and through the blind canvases the territory of the site will not be visible.
The advantages of the rail system include the simplicity of the mechanism. By the way, some craftsmen even make the device with their own hands. Another plus is, of course, compactness. In the "wicket" mode, the door leaf can be moved back a short distance necessary for a person to pass through, and thanks to the roller, the leaf does not sag. Therefore, such a system does not require frequent adjustments, unlike swing gates.
But since the rail is located on a concrete surface, atmospheric precipitation can disable the mechanism and block its operation. Therefore, it is important to periodically remove debris and snow from the path of the roller. Keep in mind, experts recommend to mount the rail in a concrete foundation "flush", this will minimize harmapplied by transport to the rail.
In cantilever doors, the rail holding the sash is attached directly to the leaf. It can be fixed in the lower, upper part of the canvas or in the middle - there is not much difference in this. The main thing is that the rail is of the required length, sufficient to hold the sash. Otherwise, it will be necessary to install an additional electric drive from the opposite side, after which the double-leaf gates will open both to the left and to the right.
Since the guide bar is installed on the canvas, it does not depend on the cleanliness of the foundation or on the height. To balance the weight of the gate, it is necessary that the door leaf be one and a half to two times longer than the opening, otherwise it will not work to establish the correct operation of the product.
Keep in mind that the rail, or as it is also called "channel", can be installed on both blind and lattice structures. In this case, it will be necessary to fill in a solid foundation so that the supports do not vomit from the weight of the gate.
Constructions
The overhead gate drive device is located in the upper part and roller trolleys are attached there. This is due to the design feature of this type. It follows that if the mechanism needs to be repaired, then certain difficulties may arise. In particular, an aerial platform is required to adjust the four-meter flaps. In most cases, for this reason, this type of sliding gate is not installed in the private sector.
Some manufacturers bring the adjustment of the drives to the height of a person's height, but, unfortunately, this only complicates the operation of the device, since additional installation of rails and pulleys is required. And any complication leads to frequent breakdowns.
Console-type roll-out gates are most often equipped with a drive, a roller block and a guide in the lower part of the leaf. Quite often, installation is practiced in the middle and less often at the top. It depends on the length of the opening, the solidity of the supports and the strength of the foundation. The location of the drive can also be affected by the arrangement of the courtyard and the features of the metal frame.
Sliding rail gates are distinguished by the even distribution of the weight of the door leaf on the supports and on the foundation. Thanks to this, the load on the device is reduced to zero, which means that the operator can be located in any part of the gate. It is often placed either in the middle or at the top. In the lower part, a roller base and a guide rail are mounted.
Separately, I would like to emphasize that the location of the drive will depend on the intensity of the load. If the canvas rarely opens, then it is necessary to install low-power devices for it, otherwise it will be necessary to purchase powerful, and, accordingly, expensive products.
Advantages and disadvantages
First of all, I would like to pay attention to the lower part. For example, at a suspended gate, you only need to ensure that the distance between the ground and the canvas is free. In this regard, the only obstacle may be sudden snowfall, and only half-meter snowdrifts can block the work.
The maintenance of cantilever and rail types of doors is different, provided that the roller base is located in the lower part. In the first option, there will be periodic cleaning of the foundation from ice and snow, and in the second case, the purchase of special equipment.
Therefore, in regions where there is a large amount of precipitation in winter, experts do not recommend installing rail sliding gates.
But at the same time, sliding options moving along the rail require less maintenance of the drive and mechanisms in the winter season. In second place are sliding suspended gates, but most of all attention will be paid to the cantilever version, in which the moving device is located at the bottom. As for the annual preventive measures, they are carried out in the same way for all varieties - 2-3 times a year.
The rail system is the most expensive in terms of the cost of the product, installation and maintenance, further in the improvised rating is the suspension system, but the cheapest option is the cantilever gate. In the first five-year period, the console requires the least attention and material investments.
Summing up, we can state that it is often the cantilever doors with the beam at the bottom or in the middle that are installed in the private sector. But keep in mind that suspended structures can last for decades. Even today, there are workable examples mounted 50-60 years ago.
Drawings and diagrams
As an example, a version of the console system with the drive in the lower part will be considered. Depending on the location of the drive and on the opening side, the sketches may differ slightly.
The gate leaf is directly attached to a metal frame, which is a frame made either from a metal profile or from a steel pipe. A guide is welded to the metal frame. It is often presented as a toothed rack, especially for motorized structures. A roller base is mounted inside the guide bar. Typically, in a cantilever system, a roller bed refers to a carriage with wheels.
The guide, moving left and right, moves the gate leaf in the appropriate direction, thereby opening or closing the entrance. Since the entire sash gravity is transferred to the beam and to the roller base, an unloading roller and catcher are mounted at the bottom of the curtain to minimize the load. This ensures that the cantilever door does not sag when closed. In some products, the unloading roller and catcher are additionally installed on the opposite side, which ensures that the gate is kept open.
The door leaf is fixed in the upper part by means of a catcher and a beam with carriages. To prevent dirt and dust from getting inside the structure, a side plug is used. Support pillars must be installed from a solid reinforced concrete base, brick or metal pipe. Particular attention is also paid to the foundation for the lower rail, otherwise the entire structure will collapse under its own weight. There is a high probability of damage to property, including someone else's, and the risk of injury to people passing by.
The previously mentioned electric drive can be easily mounted between the carriages, the toothed rack is fixed directly to the gate leaf, a control device, photofixers and satellite navigation are located nearby.
Calculation of materials
If old structures are to be dismantled before installing sliding gates, close attention should be paid to the previously used support pillars. They can be made of metal profiles, bricks with embedded or reinforced concrete. remember, that the deflection of the supports is unacceptable - they must stand strictly vertically, otherwise the gate leaf will touch the foundation. If the pillars are askew, it says only one thing: they are incorrectly fixed in the ground.
By the way, it is recommended to keep the distance between the foundation and the fence minimal, and it is best to equip the foundation close to the supports.
If the support pillars meet the requirements, then this can be saved. If you plan to install from scratch, then two supports are required. When choosing a reinforced concrete base, it is customary to erect a vertical with dimensions of 20x20 cm; for a base from a profile pipe, a product with dimensions of 60x40 cm is suitable.
The dimensions of the door leaf can vary considerably. This will depend on the free space along the fence, the size of personal vehicles and the size of the site. In most cases, the gate wing has dimensions equal to 4400 cm in length and 2000 cm in height.
If heavy trucks periodically enter the territory of the site, then the height of the support, foundation and distance must be calculated based on this. Keep in mind, even small trucks can destroy the foundation.
You should know that the width of the carriageway affects the size of the gate leaf: the narrower it is, the wider the canvas should be. This makes it easier to enter and exit the territory.
Provided that it is planned to move only light vehicles, you need to build on only the dimensions of the car. Let's say the width of the car is 2 meters. To this must be added the small distance required for unhindered entry-exit: the distance should be at least one meter. The height of the sash in private plots rarely exceeds 2 meters.
Other sizes for trucks. It is important that there are no height limiters, and the passage width is 4.4-5 meters. It is useful to know that the height of SUVs is rarely exceeded 1.5 m, while for Gazelle it is 2.5 m. KAMAZ and its analogs are considered to be the highest in height: in this case, the upper height bar should be at least 3 m.
The maximum angle of arrival is usually 45 degrees. It follows from this that the distance between the support and the car should ideally not be less than 0.5 m. The length of the counterweight should be equal to 40-45% of the opening width. It is unacceptable for this indicator to be less than 33%.
It is important to take into account that shrubs and trees should not grow on the path of the canvas, and there should not be interfering buildings.
Fittings
If the structure has standard dimensions (4 meters wide and 2 meters high) and is sheathed with corrugated sheets, then you will need to buy accessories that can withstand the weight of the canvas, equal to 400 kg. Accordingly, with an increase in the length of the blade, reinforced fittings are selected.
In this case, the rollers are either polymer or metal. The length of the guide beam should have been 6 m, and its section should be 60x70 cm. Keep in mind that the thickness of the walls of the metal profile should not be less than 3.5-4 mm. The four-meter metal frame must be assembled with a small margin.
Usually, experts recommend that the length of the frame be equal to 4200 cm. In this case, the length of the counterweight, calculated using the previously described formula, will be 1600 cm.
Carriages are required in order for the roller base to move freely along the rail. To fix the position of the leaves in the open and closed position, end rollers and catchers are mounted. As noted earlier, plugs are installed to prevent dust and debris from entering.
In most cases, this hardware is used. Minor changes are made when using not a cantilever, but a roller or suspension system. To minimize lateral swing, a plateau with rollers is attached in the upper part, and in the lower part, fixation and movement is carried out by a carrier trolley.
Manufacturing instruction
Based on practice, the easiest way is to do the installation of sliding gates moving on rollers along the rail with your own hands. In this case, the installation can be made from scrap materials or using purchased accessories.
It should be noted that before starting work, a drawing of the future gate will be required. It is important that the diagram is easy to read. All dimensions must be applied on it, including supports and foundations, the necessary accessories used in the work, as well as parts that will depend on the location of the retractable system. By the way, many consumers, not wanting to use mechanical opening methods, buy electric drives before installation - this should also be reflected in the sketch.
Please be aware that homemade videos may vary slightly from each other, but even minimal deviations can disrupt the performance of the entire system … From this point of view, it is better not to save money and buy the same factory videos in advance.
The wicket can be built into the gate or exist separately from it. In the first case, the elderly and young children have to periodically raise their legs. If you do this inadvertently, you can even stumble and injure. If the wicket is mounted separately, then it must be installed on the opposite side from the opening of the leaves so that the door leaf does not block the passage.
It is impractical to completely abandon the wicket, since any mechanism is designed to open a certain number of times. If you use sliding gates as a wicket quite often, the drive will fail.
Installation of sliding gates begins with the preparation of the base. But first things first. Below you will find step by step instructions.
Preparatory work
It is very important that no bushes and trees grow along the route of the gate leaf. If any plantings are planted, they will either have to be transplanted or uprooted.
Outbuildings, baths and toilets that interfere with the opening of the door leaf will have to be dismantled. The earth will need to be removed from the slope so that the sash moves freely without touching the surface of the earth.
After the area is cleared, the foundation will be poured. For the first time, you will need shovels, a tape measure, a laser rangefinder and a garden drill from the tools.
If you have a motor-drill at hand, then the work will be done faster.
During the arrangement of the territory with suspended sliding gates, the foundation is not needed, it is enough to dig holes for the supports when planning the installation of metal pillars. To do this, the location of future holes is marked on the ground using a tape measure or using a special tool. The distance between the supports must correspond to the previously indicated dimensions.
As a rule, the gates are installed last, which means that a fence has already been mounted on the site. A metal fishing line is tied to the extreme supports, a metal chain with a weighting agent is suspended through it. On it, the evenness of the pits relative to the fence is set and checked.
Unfortunately, the design features of the motor-drill do not allow it to be built up, and in order to deepen the metal pipes into the ground, 1.5 meters have to be dug. If heavy trucks pass through the passage from time to time, the height of the supports may be increased. Thus, it will be necessary to bury the metal in the ground in proportion to the protruding above-ground part.
In this case, it is easiest to dig with a garden drill, since it can be increased. After passing the fertile layer, either clay or rocky base will begin.
In the first case, water will be required. The drill will be easier to enter into such soil, but it will be more difficult to pull it out to the surface. And in the second option, you have to get rid of the stones. Particularly large specimens will need to be broken with a crowbar or reinforcement.
The diameter of the future holes must correspond to a metal profile or steel pipe. The larger the diameter or size of the pipe, the larger the hole should be. But remember that this will require more cement-sand mixture and crushed stone.
The height of the holes is easiest to check either with a tape measure, while its length should be 5-10 m, or with a special laser pointer. Such holes will need to be made from 2 to 4 pieces, depending on the presence or absence of a wicket, as well as starting from the functional features of the design.
If it is not possible to build up a garden drill or there are difficulties with a deepening, then the metal support must be hammered with a sledgehammer. Yamobur can be considered another way out of this situation. The drilling machine will make the required hole in a short time.
Metal posts must be anchored in the ground. But first, a "pillow" is laid on the bottom - a layer of rubble. In this case, the stone acts as a drainage, because thanks to this approach, the water will not stagnate and the pipe will not burst.
Some experts recommend painting metal pipes before lowering them into the hole, while others construct a special "glass" of plastic pipes. Such operations are justified provided that the groundwater is located in relative proximity.
Brick and reinforced concrete supports must have embedded, often three pieces are enough. When placed above and below, it is enough to retreat 200-250 mm, the last mortgage is installed at an equidistant distance from the extreme ones. Subsequently, some details will be attached to them.
For mortgages, it is enough to take a steel sheet with dimensions of 100x100 mm, the thickness of the product should not be less than 5-6 mm.
The next stage involves the use of a concrete mixer to create a cement-sand concentrate. In what proportions to dilute cement and sand, it is usually indicated on the bags. If this information is not available, then it is enough to add 6 kg of sand to 2 kg of cement. Additionally, 12 kg of aggregate and 2 liters of water are added.
The substance must be kneaded thoroughly, no lumps should remain. If a concrete mixer is not available, then this procedure will have to be performed using an ordinary drill and a special nozzle.
After that, the concrete is poured into the pits. Remember, you need to monitor the evenness of the posts. Drying is a long process. At high temperatures, complete drying is achieved in a week, and if cementing is carried out in the cold season - up to a month.
When installing sliding gates, the foundation will be poured between the span and along the fence by the size of the door leaf. To begin with, a trench is dug right next to the fence. Its dimensions should be 50 cm wide and 100 cm deep. The length of the trench will be equal to twice the length of the gate leaf.
If desired, formwork can be made. If it is for temporary use, then sheets of plywood, old boards and the remains of chipboard are used. If you plan to use it repeatedly, you will have to purchase moisture-resistant high-quality building materials.
The manufacture of shields must be done on the ground, and after creating the formwork, immerse it in a trench. The boards are fastened using self-tapping screws and a screwdriver; it is permissible to use nails and a hammer. Pegs are driven into the ground, a rope is pulled along the perimeter.
A small layer of rubble and a sand cushion are laid at the bottom of the trench; reinforcement is required for good fixation of the cement. Experts recommend using reinforcement number 10. You can weld it with your own hands, or buy a ready-made reinforcing mesh and tie it with soft wire.
For sliding gates on the metal frame, you will need to lay a guide rail. A channel can be used as a rail. At the same time, it is important to lay it upside down and set it parallel to the ground. Subsequently, the carriage will be attached to this guide.
As for the foundation for the cantilever gates, it is equipped in relative proximity to the support pillar. The length of the structure will be half the width of the span, most often 2 m is enough. The depth will depend on the location of groundwater and the level of soil freezing. Don't forget to install the channel.
When pouring concrete into the trench, try not to pour the channel. Keep in mind, the screed must be bayonetted at this moment, thanks to this excess air will be released. During the first days, the concrete base should be checked and moistened from time to time.
It is important that the concrete does not crack during the time allotted for drying, otherwise its strength will be minimal.
Unlike swing gates, where two drives are required, one motor is purchased when automating the sliding system. But it must be recalled that to facilitate the work of the structure, it is permissible to use two leaves and it will be necessary to equip it with a second electric drive from the opposite side.
Automatic gates can be mounted by purchasing a set of necessary parts and mechanisms in a specialized store, or, having a certain skill and experience, make it yourself.
Automation allows you to open the gate using the control panel without leaving the car or directly from home. There are two types of consoles with floating and fixed code.
In the first case, it is almost impossible for attackers to find a combination of numbers. Household burglars can read the combination of a fixed code. There is also a high probability of accidental opening when the signal matches. In other words, if a person passing by pressed the car alarm button, or someone in the neighboring house turned on the chandelier with the remote control, then the code may match, and the gate will open. Therefore, you need to think carefully before buying an electrical system, which one is better to take, but saving in this matter is impractical.
Still, the main part is the engine. It comes with a chain signal and a roller. The engine must be selected taking into account the specifics of the site: if a meter with three phases is installed on the territory, then it is advisable to purchase a three-phase motor.
It is very important that its windings are star-connected. Thanks to this, it will be possible to eliminate a number of problems that arise during the operation of the drive. The device will operate at maximum power, and therefore with good efficiency.
Alternatively, a single-phase motor can be used. In this case, it is important that it is of the capacitor type. Its main feature is considered to be low performance, including when starting the mechanism. The power of the unit should not be lower than 1-2.5 kW. It will depend on the weight of the gate leaf.
The speed indicator is from 500 to 1000 rpm. Low indicators allow you to get rid of a significant load, including on the base of the drive shaft.
When using single stage type gearboxes, a drive wheel is required. It should not exceed 100 rotations per minute. From this it follows that the torque input must correspond to the engine speed.
It is permissible to use cheap analogs, but keep in mind that the kinematic diagram should not have bad connections. An alternative to the engine can be a running motor from a washing machine. Such products are often thrown into landfills, which means that the engine can be obtained for free.
Before connecting the motor, you will need to determine where the ends of the winding are located. This will help a device called a multimeter. Large resistance values will be for the starting type winding.
A rigid or semi-rigid coupling is required to fix the gear shaft to the motor. In the first case, the body resembles a sleeve, the connection occurs due to various holes and special grooves. In a semi-rigid coupling, the connection is provided by two flanges and rubber elements.
A belt-type transmission can serve as a replacement for the gearbox. The belt drive runs on bearings that are located on an independent shaft.
Keep in mind that the shaft must be centered or the transmissions will not work properly. The belt drive is very difficult to assemble.
Installation
First of all, a metal frame is made, which must completely cover the opening. They make it from a profile pipe of the required section, which depends on the weight of the future structure. In order to do this work yourself, you will need an angle grinder, which is popularly called a "grinder", and a welding machine.
The metal frame can be equipped with a wicket, but at the same time it is not forbidden to make it separately. Do not forget to mount the constipation. It is worth noting that an additional support is required for a free-standing wicket.
Some people believe that the automation is correctly installed at the time of installation of the sliding gates, and not after some time, since some errors can be corrected on the spot.
If the electric motor is installed on an already operating gate, some elements will have to be dismantled, and this leads to additional expenses.
When automation is made from improvised means, a bicycle sprocket is attached to the gear shaft. If such a part is not at hand, a motorcycle sprocket will do. Subsequently, a corresponding chain is installed on this element. It is fixed along the entire gate leaf strictly in the horizontal plane. When the sprocket turns to one side, the gate either opens or closes.
The engine is attached to a metal frame, which is made of steel. The frame must be installed on a dry foundation and firmly fixed. The stronger the connection, the longer the whole structure will last.
When choosing a gearbox, it is necessary to pay attention to the height of rotation along the axis. In the gear wheel, axial tightening is carried out by beads. The height of the beads depends on the fixation of the wheel in the axial direction. Therefore, it is highly likely that a two-level base will be required in order to fit the gearbox with the motor.
Bolts and special nuts are used to connect the gearbox to the motor. The base underneath should be flat and made of durable material. To make it easy to adjust the position of the engine, small holes are made under the support.
An additional guide is installed on the gate leaf, at a height of 50 cm to 80 cm from the base. A toothed rack is attached to this beam. The ends are protected with plugs, so that dust and debris will not get clogged inside. The guide must be well welded to the gate.
To prevent the chain from stretching, the product is equipped with a special roller with a stiff spring. Some people install an eye piece on the last link of the chain - this ensures that the chain is tightened at the moment of opening and closing.
It is not only overhead gates that differ in the arrangement of rollers in the upper part of the structure. Installing such elements at the top is also required for rail gates. The upper roller secures the sash, thanks to which the door leaf can withstand the wind load.
The pressure rollers are attached to the bottom of the sash and then easily move on the rail. It is important to pay attention to steel products with sealed bearings when purchasing a roller base. They must be able to support the weight of the gate.
Also, do not forget about the response rollers, which are mounted on the opposite side.
It is important to check the operation of the structure before connecting the automation. When opening or closing the gate leaf, nothing should interfere, and the gate must not bend from its own weight. Do not forget about the installation of catchers, which will allow the gate to close without changing the trajectory of movement.
Welding is used to connect the automation elements, to fix the channel with the guide, as well as to install the rack with teeth. The drive, installed on the channel, is bolted. Holes on the channel must first be drilled out. For this, simple metal drills are suitable.
Next, you have to install limit switches. They are magnetic or mechanical. The first option also works in bad weather. The magnet is mounted directly on the toothed rack. In the principle of operation of the second option, the main emphasis is on the spring.
All adjustments are made according to the instructions from the manufacturer. The sliding gate design additionally includes not only sound signaling, but also a signal lamp and several photocells.
Photo fixation allows the device not to close the gate leaf if there are foreign objects in the path of movement, including cars or animals. This is very important if there are small children in the family. Unfortunately, without photocells, there is a high likelihood of injury.
The satellite system allows you to open the sliding gates in advance, approaching the house a few meters away, you can open not only the door leaf, but also the swing-lifting mechanism in the garage. This significantly saves time, since you do not need to get out of the car.
Decor
Wrought iron sliding gates are considered strong, durable and beautiful. They go well with brick or stone fences and supports, as well as wood inserts.
Moreover, they can be both open and closed. Metallic patterns noticeably adorn the front of the fence. They can be made according to special designs, thereby emphasizing the individuality and tastes of the owner. But at the same time, expensive gates can attract intruders, since they unequivocally hint at the financial situation of the property owner.
In order to reduce the cost of the product, forged gates can be manufactured according to the standard drawing. Direct rolling technology is often used here. No decorations and monograms are provided, only the classic design.
Since the gate is installed outdoors, it is very it is important that they are processed at the production stage. For this, cold galvanizing is used. Weld seams are cleaned, primed and painted. Special enamel of any color is used as a paintwork.
Lovers of wooden structures fix processed wood on a metal frame. From the point of view of weighting the structure, this is not entirely justified, since it can greatly affect the support pillars and other elements.
Sheets of corrugated board and euro shtaketnik weigh less. They are attached to a metal frame using special hardware and a screwdriver. The use of a riveter is acceptable. Rivets clamp metal sheets more effectively than self-tapping screws. Self-tapping screws can be twisted, but it is problematic to dismantle rivets.
Sandwich panels are widespread in the West. They are lightweight, easy to install and affordable. In stores there are products in brown or white.
Don't forget about airbrushing. The drawing is done by a professional artist using special equipment. The cost of his work, of course, depends on the complexity of the drawing.
In order to save money, you can glue special typographic pictures. Volumetric 3D stickers highlight and mask the gate at the same time.
Operating tips
In order for the sliding gates to serve as long as possible, you should only drive through a free span. It follows from this that there should not be any objects interfering with the passage, including the ingress of foreign elements into the structure is unacceptable.
It is important to pay attention to the sound generated when opening or closing the sash. This may indicate an impending damage to the product, which means that timely prevention and adjustment will be required.
Adjustment implies periodic lubrication of the moving mechanisms of the structure. In order to prevent rust on the metal parts, it is necessary to treat them with a special agent - WD-40, or, as it is popularly called, “Vedashka”, once a trimester.
The engine is lubricated and inspected every year. For this operation, it is advisable to call a specially trained person, otherwise the responsibility for the result falls on the shoulders of the owner.
In the winter season, you will need to keep track of the cleanliness of the rail and guides. Icing of the roller base and other parts that affect the operation of the sliding gates is unacceptable. Periodically you need to tighten the bolts and screws.
The cable system must be protected from atmospheric precipitation. Do not forget to check its performance every 3-4 months.so that the sliding gates can be opened even without electricity. Otherwise, it will not work to get into the territory of the site when the power is turned off.
For information on how to make a sliding gate with your own hands, see the next video.